Apparatus for making extracts.



No. 644,872. Patented Mar. 6, [900. E. SCHLIEMANN &. E. VON BDYEN.

APPARATUS FOR MAKING EXTRACTS.

(Application filed May 5,.1898.)

2 Sheets-Sheet i.

(No Model.)

No. 644,872. Patented Mar. 6, I900. E. SCHLIEMANN &. E. VON BDYEN.APPARATUS FOR MAKING EXTRACTSM (Application filed ma 5, 1598. (NoModel.)

' 7m Ziw M0. 6M A 7 NITFD TATES ATENT Fries,

ERNST SCHLIEllIANN AND EDGAR VON BOYEN, OF HAMBURG, GERMANY.

APPARATUS FOR MAKING EXTRACTS.

SPECIFICATION forming part of Letters Patent No. 644,872, dated March 6,1900. Application filed May 5, 1898. Serial No. 679,780. (No model.)

we have applied for patents in England, No.

6,430, dated March 16, 1898; in Austria, dated February 21, 1898;in'Hungary, No. 2,591, dated February 23, 1898; inRussia, No. 4,000,dated February 19, 1898; in France, No.

362,308, dated January 31, 1898; in Belgium,

No. 104,518, dated February26, 1898; in Italy, dated February 24, 1898;in Spain, dated February 26, 1898, and in Portugal, dated March 5,1898,) of which the following is a specification.

This invention relates to an apparatus for continuous extraction inwhich, as in the method adopted with lixiviatingtanks used in themanufacture of soda, fresh extracting medium is caused to enter thattank in which the material under treatment is almost completelyexhausted and during its passage through the apparatus to becomegradually more and more enriched or laden with extract until it leavesthe last of such tanks, when it is entirely saturated.

To renderourinvention readily understood, we have annexed a sheet 'ofdrawings, in which Figure 1 is a vertical section of our uniformimproved apparatus, and Fig. 2 a plan. Fig. 3 is a fragmentary sideelevation of the extracting apparatus looking from the left. Fig. 4 is alike View of the said apparatus, but looking from the right. Fig. 5 is ahorizontal section taken through the extracting apparawe on the line M Nof Fig. 1, and Fig. 6 is a front elevation of one of the doors used inconnection with each chamber of the apparatus.

The said apparatus consists, essentially, of a number of receptacles orchambers a to a arranged columnwise and each closed airtight by a doorJ,securely supported by a cross-bar J and tightening-screws J In thesechambers are located tanks b. to 19 in which are placed the materials tobe treatedsuch, for instance, as ceresin, petroleum residue, bones,offal, or other fatty substances. These tanks are supported onangle-irons so arranged as to leave a space between the bot tom of thetank and that of the chamber to allow for the flowing out of theextract. The solvent or menstruum is introduced either in a gaseous orin a liquid form by means of the pipe D, which extends along the columnand is connected by branch pipes orsupply connections provided withcocks 'r, with perforatedserpentines or coils d to d arranged above thetanks 1) to Z).

The extract flows through the perforated bottoms c to 0 of the tanksinto the pipes or delivery connections f to f and passes throughsuitable piping or connections,capabio of being closed by cock .2, intothe inlet portion 6 of the serpentine 61 below. The pipes f to f areeach provided with a testcock 7.0, from which samples can be drawn offwhen desired to test the working of the extracting process. All thedraw-off pipes f to f can be put into communication with one another bymeans of a pipe G. In connection through the cooks s with the pipes clto 01 for the solvent is a pipe P, up which the extract rises, the pipeleading upwardly from the delivery connectionfof the lowest tank, so asto enable extract to be returned into any one of the serpentines. Thesolution on leaving the first chamber enters the serpentine of thesecond chamber and passes through the perforations of the respectivecoil into the material under treatment, from which it takes up more fator the like and then passes into the serpentine in the third chamberthrough a similar branch pipe in the pipe D, and so on until thesaturated extract finally enters the distilling apparatus A B, one orthe other of which is alternately at work.

In connection with the pipes d to (Z is a third pipe X, provided withcocks t for supplying steam to the exhausted residue in the tank on theclosing of the cooks in the pipes P and D, the latter of which suppliesthe solvent. The steam, together with any remaining solvent and tracesof fat or oil, escapes through the pipe G by closing the cooks andopening the cock w and enters the distilling apparatus, so preventingloss both of solvent and of extract.

To start the extracting process, the cocks w on the pipe G and thesteam-supply pipe X, as well as the valves 0" for supplying benzene orthe like, are closed, but the uppermost valve 1 is left open. Thevaporized solvent such as benzene, benzole, naphtha, carbon bisulfid,sulfid chlorid, ether, and alcoholsupplied from a heater (not shown)presses through the top valve 0" into the serpentine d, and thence intothe freshly-charged tank I), from which it escapes after having absorbedthe extract through the pipe (1, cock 2, and inlet 8 into the lowerperforated serpentine (I and so on. lhus it is obvious that while thefirs ttank b is completely exhausted by the incoming vapor of benzene orthe like the material in the last tank b will be only slightly actedupon by the already-enriched solvent. On it being ascertained by takingsamples from the cock w that the first tank I) is completely exhaustedthe second tank 19 becomes the first, the cocks being then reversed andthe exhausted tank Z) disconnected for the purpose of being refilledwith fresh material. The vapor of solvent now enters direct into thesecond tank, and after passing out from the last tank D the now enrichedsolvent flows through the pipe P into the first tank h before enteringthe distilling apparatus Prior to discharging the exhausted tank it is,as above described, freed by steam from the last traces of solvent andextract, which are driven out through the pipe Ginto the seconddistilling apparatus.

By means of this improved apparatus the complete exhaustion of thematerial under treatment can be effected in the shortest possible timeand with the smallest possible quantity of solvent. Also by itsarrangement losses which have hitherto been unavoidable even with thebest constructed extracting ap paratus are avoided.

Each tank when completely exhausted can at once be disconnected and neednot, as heretofore, be kept in communication with the solvent until allthe other tanks are completely exhausted one after the other.

Obviously this apparatus can be used with any appropriate solvent, andit can likewise be employed for extracting mineral oil and fattysubstances, as well as for extracting other substancesforinstance, theprincipal constituents for certain drugs.

What we claim, and desire to secure byLetters Patent of the UnitedStates, is-

An apparatus for continuous extraction consisting of a series of closedreceptacles constituting chambers and arranged columnwise, a tank ineach chamber provided with a perforated bottom and supported so as tohave a free space between the bottom of the tank and that of thechamber, a supply-pipe for supplying the extracting liquid, perforatedserpentines above said tanks, supply connections, including cocks, fromthe said supply-pipe to the said serpentines, a delivery-pipe anddelivery connections, including cocks, leading to said delivery-pipefrom the spaces between the tank and chamber bottoms, and adapted todraw off the extract, connections, including cocks, from thedelivery-pipe connections of each chamber to the serpentine in the nextchamber below, testcocks in the respective delivery connections, a pipeleading upwardly from the delivery connection of the lowest tank,connections, including cocks, from said pipe to the supplypipeconnections of the respective tanks, and a steam-supply pipe andconnections, including cocks, leading therefrom to the said supplyconnections, substantially as and for the purpose set forth.

In testimony whereof we have hereunto set our hands in the presence oftwo Witnesses.

ERNST SCHLIEMANN. EDGAR VON BOYEN.

\Vitnesses:

GUSTAV HUBER, E. H. L. MUMMENHOFF.

